Hot Hardware published a review on the Intel SSD DC P4600 NVMe PCIe: Low-Latency TLC Storage For The Data Center A quote from the article:

Last year, Intel updated its line-up of NVMe, PCI Express-based solid state drives, for cloud and data center applications, with a couple of different models tuned for different workloads. The Intel SSD DC P4600 we will be showing you here was among those drives. It features a fourth-generation Intel controller and performance-optimized firmware, along with 3D TLC NAND flash memory (384Gb per die). If you remember, the DC P3700 we looked at a few years back had an 18-channel controller and MLC NAND, so the P4600 may sound like a downgrade in some respects, but as you'll see a little later, performance is still strong with this newer drive relative to its predecessor...

 Intel SSD DC P4600 NVMe PCIe Review: Low-Latency TLC Storage For The Data Center @ HotHardware